Trilobite to Staurolite

Roadside Geology of Georgia co-author Dr. Bill Witherspoon takes you on a journey through time and space, from Georgia’s northwest corner to Greater Atlanta. Why do the rocks in the first location preserve delicate impressions that extinct critters left in mud, while at the second location, rocks are “well-cooked” enough to have erased fossils and grown crystals such as staurolite “fairy crosses”? Why are layers of mud at the first place as smooth as the day they settled out of water, and at the